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Finding the Fourth Proportional to 653,649.28, 902,134.20 and 399,147.28

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Solution

The fourth proportional to 653,649.28, 902,134.20 and 399,147.28 is: 550,883.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    653,649.28 : 902,134.20 = 399,147.28 : x
  2. Step 2: Convert to fraction form
    653,649.28/902,134.20 = 399,147.28/x
  3. Step 3: Cross multiply
    653,649.28x = 902,134.20 × 399,147.28
  4. Step 4: Simplify right side
    653,649.28x = 360,084,412,124.98
  5. Step 5: Solve for x
    x = 360,084,412,124.98/653,649.28
  6. Step 6: Final answer
    x = 550,883.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.